diff mbox series

[net-next,2/5] net: split __zerocopy_sg_from_iter()

Message ID e128f814a989914c27318dcbd8f8c7406c9b9fd3.1719190216.git.asml.silence@gmail.com (mailing list archive)
State New
Headers show
Series zerocopy tx cleanups | expand

Commit Message

Pavel Begunkov June 27, 2024, 12:59 p.m. UTC 
Split a function out of __zerocopy_sg_from_iter() that only cares about
the traditional path with refcounted pages and doesn't need to know
about ->sg_from_iter. A preparation patch, we'll improve on the function
later.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 net/core/datagram.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

Comments

Willem de Bruijn June 28, 2024, 5:03 p.m. UTC | #1 
Pavel Begunkov wrote:
> Split a function out of __zerocopy_sg_from_iter() that only cares about
> the traditional path with refcounted pages and doesn't need to know
> about ->sg_from_iter. A preparation patch, we'll improve on the function
> later.
> 
> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>

Reviewed-by: Willem de Bruijn <willemb@google.com>
diff mbox series

Patch

diff --git a/net/core/datagram.c b/net/core/datagram.c
index 95f242591fd2..7f7d5da2e406 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -610,16 +610,10 @@  int skb_copy_datagram_from_iter(struct sk_buff *skb, int offset,
 }
 EXPORT_SYMBOL(skb_copy_datagram_from_iter);
 
-int __zerocopy_sg_from_iter(struct msghdr *msg, struct sock *sk,
-			    struct sk_buff *skb, struct iov_iter *from,
-			    size_t length)
+static int zerocopy_fill_skb_from_iter(struct sock *sk, struct sk_buff *skb,
+					struct iov_iter *from, size_t length)
 {
-	int frag;
-
-	if (msg && msg->msg_ubuf && msg->sg_from_iter)
-		return msg->sg_from_iter(sk, skb, from, length);
-
-	frag = skb_shinfo(skb)->nr_frags;
+	int frag = skb_shinfo(skb)->nr_frags;
 
 	while (length && iov_iter_count(from)) {
 		struct page *head, *last_head = NULL;
@@ -692,6 +686,16 @@  int __zerocopy_sg_from_iter(struct msghdr *msg, struct sock *sk,
 	}
 	return 0;
 }
+
+int __zerocopy_sg_from_iter(struct msghdr *msg, struct sock *sk,
+			    struct sk_buff *skb, struct iov_iter *from,
+			    size_t length)
+{
+	if (msg && msg->msg_ubuf && msg->sg_from_iter)
+		return msg->sg_from_iter(sk, skb, from, length);
+	else
+		return zerocopy_fill_skb_from_iter(sk, skb, from, length);
+}
 EXPORT_SYMBOL(__zerocopy_sg_from_iter);
 
 /**